505534245561 has 48 divisors (see below), whose sum is σ = 767768002560. Its totient is φ = 319918658400.

The previous prime is 505534245521. The next prime is 505534245577. The reversal of 505534245561 is 165542435505.

505534245561 is a `hidden beast` number, since 5 + 0 + 5 + 5 + 3 + 42 + 45 + 561 = 666.

It is not a de Polignac number, because 505534245561 - 2¹⁵ = 505534212793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505534245521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33968920 + ... + 33983798.

It is an arithmetic number, because the mean of its divisors is an integer number (15995166720).

Almost surely, 2^505534245561 is an apocalyptic number.

It is an amenable number.

505534245561 is a deficient number, since it is larger than the sum of its proper divisors (262233756999).

505534245561 is a wasteful number, since it uses less digits than its factorization.

505534245561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16146 (or 16143 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 45.

The spelling of 505534245561 in words is "five hundred five billion, five hundred thirty-four million, two hundred forty-five thousand, five hundred sixty-one".